fix(npcs): stop TipTap crash black screen in secondary windows

Guard TipTap getHTML under StrictMode, wrap secondary window roots in WindowErrorBoundary, and add stability regression tests.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/renderer/presentation/main.tsx

@@ -2,6 +2,8 @@ import React from 'react';
 import { createRoot } from 'react-dom/client';
 
 import '../shared/ui/globals.css';
+import { WindowErrorBoundary } from '../shared/ui/WindowErrorBoundary';
+
 import { PresentationApp } from './PresentationApp';
 
 const rootEl = document.getElementById('root');
@@ -11,6 +13,8 @@ if (!rootEl) {
 
 createRoot(rootEl).render(
   <React.StrictMode>
-    <PresentationApp />
+    <WindowErrorBoundary title="Презентация">
+      <PresentationApp />
+    </WindowErrorBoundary>
   </React.StrictMode>,
 );